531646136 has 48 divisors (see below), whose sum is σ = 1152248400. Its totient is φ = 225275904.

The previous prime is 531646097. The next prime is 531646147. The reversal of 531646136 is 631646135.

It is a super-2 number, since 2×531646136² = 565295227847460992, which contains 22 as substring.

It is a hoax number, since the sum of its digits (35) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 531646096 and 531646105.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 526400 + ... + 527408.

It is an arithmetic number, because the mean of its divisors is an integer number (24005175).

Almost surely, 2^531646136 is an apocalyptic number.

531646136 is a gapful number since it is divisible by the number (56) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 531646136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (576124200).

531646136 is an abundant number, since it is smaller than the sum of its proper divisors (620602264).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

531646136 is a wasteful number, since it uses less digits than its factorization.

531646136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1216 (or 1115 counting only the distinct ones).

The product of its digits is 38880, while the sum is 35.

The square root of 531646136 is about 23057.4529382584. The cubic root of 531646136 is about 810.1042064784.

Subtracting 531646136 from its reverse (631646135), we obtain a palindrome (99999999).

The spelling of 531646136 in words is "five hundred thirty-one million, six hundred forty-six thousand, one hundred thirty-six".